Vacuum buffer damper for flywheel energy storage

Abstract

The utility model relates to the technical field of flywheel energy storage, and discloses a vacuum buffer damper for flywheel energy storage, which comprises a KF type vacuum connecting pipe arranged between a KF type vacuum interface and a high-precision vacuum sensor, a partition plate used for dividing the interior of the KF type vacuum connecting pipe into an upper cavity and a lower cavity is fixedly connected to the middle of the interior of the KF type vacuum connecting pipe, and a first airflow opening communicated with the upper cavity is formed in the position, located at the upper end of the partition plate, of the outer side of the KF type vacuum connecting pipe. A second airflow opening communicated with the lower cavity is formed in the position, located at the lower end of the partition plate, of the outer side of the KF type vacuum connecting pipe, and a damping pipe is fixedly connected between the first airflow opening and the second airflow opening. High-pressure gas entering the high-precision vacuum sensor is buffered through the KF type vacuum connecting pipe and the damping pipe, the flow speed of the high-pressure gas is reduced, the measuring precision of the high-precision vacuum sensor is improved, and the service life of the high-precision vacuum sensor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of flywheel energy storage, in particular to a vacuum buffer damper for flywheel energy storage. Background Art

[0002] The flywheel energy storage system is an energy storage device for electromechanical energy conversion, which uses physical methods to achieve energy storage. Through the electric / generating reciprocal bidirectional motor, the electric energy and the mechanical kinetic energy of the high-speed running flywheel are converted and stored. When storing energy, the electric energy is converted by the power converter to drive the motor to run, and the motor drives the flywheel to accelerate. The flywheel stores the energy in the form of kinetic energy, completing the energy storage process of converting electric energy to mechanical energy. The energy is stored in the high-speed rotating flywheel body; after that, the motor maintains a constant speed until it receives a control signal for energy release; when releasing energy, the high-speed rotating flywheel drags the motor to generate electricity, and the power converter outputs the current and voltage suitable for the load, completing the energy release process of converting mechanical energy to electric energy. The entire flywheel energy storage system realizes the input, storage and output process of electric energy.

[0003] In order to obtain higher conversion efficiency and reduce friction loss and wind loss of the flywheel rotor, the flywheel rotor and the motor work in a sealed high-vacuum shell. A high-precision vacuum sensor is installed on the high-vacuum shell to monitor the vacuum degree in the shell and upload data to the flywheel control system, which controls the working mode of the vacuum pump. However, when the high-precision vacuum sensor changes sharply from the atmospheric environment to the high-vacuum environment, it is impacted by the air, which is prone to feedback value distortion or sensor damage; this requires a damper to buffer the air entering the high-precision vacuum sensor.

[0004] A Chinese patent discloses a pressure gauge buffer damper (authorization announcement number CN202141558U). This patented technology is used in conjunction with a pressure gauge and is used in pressure vessels, pressure pipes, etc. in various devices such as oil refining and chemical industry. It can make the pressure gauge reading accurate and improve the operating accuracy. However, its buffering effect on high-pressure air is not good, and it may still cause distortion of the pressure gauge feedback value. Utility Model Content

[0005] The utility model aims to provide a vacuum buffer damper for flywheel energy storage to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A vacuum buffer damper for flywheel energy storage, comprising a KF-type vacuum connecting pipe installed between a KF-type vacuum interface and a high-precision vacuum sensor. A partition plate for dividing the interior of the KF-type vacuum connecting pipe into upper and lower chambers is fixedly connected to the middle position inside the KF-type vacuum connecting pipe. A first air flow port communicating with the upper chamber is opened at the upper end of the partition plate on the outer side of the KF-type vacuum connecting pipe, and a second air flow port communicating with the lower chamber is opened at the lower end of the partition plate on the outer side of the KF-type vacuum connecting pipe. A damping pipe is fixedly connected between the first air flow port and the second air flow port. The damping pipe is spirally wound around the outer side of the KF-type vacuum connecting pipe. Conical grooves are opened at both the upper and lower ends of the partition plate.

[0008] As a further scheme of the present invention: A first KF-type joint is provided at the upper end of the KF-type vacuum connecting pipe, and a second KF-type joint is provided at the lower end of the KF-type vacuum connecting pipe.

[0009] As a further scheme of the present invention: The first KF-type joint is connected to the KF-type vacuum interface, and a first KF-type clamp is jointly installed on the outer sides of the first KF-type joint and the KF-type vacuum interface. A first KF-type sealing O-ring is provided on the inner side of the first KF-type clamp at the outer side of the junction of the first KF-type joint and the KF-type vacuum interface. The second KF-type joint is connected to the high-precision vacuum sensor, and a second KF-type clamp is jointly installed on the outer sides of the second KF-type joint and the high-precision vacuum sensor. A second KF-type sealing O-ring is provided on the inner side of the second KF-type clamp at the outer side of the junction of the second KF-type joint and the high-precision vacuum sensor.

[0010] As a further scheme of the present invention: The KF-type vacuum connecting pipe, the first KF-type joint, and the second KF-type joint are all components made of stainless steel.

[0011] As a further scheme of the present invention: An asphalt damping layer is uniformly adhered to the inner side wall of the damping pipe, and the damping pipe is a component made of metal.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The present invention buffers the high-pressure gas entering the high-precision vacuum sensor through the KF-type vacuum connecting pipe and the damping pipe, reduces the flow rate of the high-pressure gas, makes the air flow of the high-pressure gas entering the high-precision vacuum sensor stable, and reduces the impact on the high-precision vacuum sensor; that is, it improves the measurement accuracy of the high-precision vacuum sensor and also improves its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a vacuum buffer damper for flywheel energy storage;

[0015] Figure 2 It is a sectional schematic view of a vacuum buffer damper for flywheel energy storage;

[0016] Figure 3 It is an installation schematic view of a vacuum buffer damper for flywheel energy storage;

[0017] Figure 4 is Figure 3 an enlarged structural schematic view of part A in

[0018] In the figure: 1. KF-type vacuum connection pipe; 11. First KF-type joint; 12. Second KF-type joint; 13. First air flow port; 14. Second air flow port; 15. Partition plate; 2. Damping pipe; 3. High-precision vacuum sensor; 4. KF-type vacuum interface; 5. First KF-type clamp; 6. First KF-type sealing O-ring; 7. Second KF-type clamp; 8. Second KF-type sealing O-ring; 9. Vacuum pump interface; 10. High-vacuum housing. Specific implementation manner

[0019] Please refer to Figures 1 to 4 , in the embodiment of the present utility model, a vacuum buffer damper for flywheel energy storage includes a KF-type vacuum connection pipe 1 installed between a KF-type vacuum interface 4 and a high-precision vacuum sensor 3. A partition plate 15 for dividing the interior of the KF-type vacuum connection pipe 1 into upper and lower chambers is fixedly connected to the middle position inside the KF-type vacuum connection pipe 1. A first air flow port 13 communicating with the upper chamber is opened at the upper end of the KF-type vacuum connection pipe 1 outside the partition plate 15, and a second air flow port 14 communicating with the lower chamber is opened at the lower end of the KF-type vacuum connection pipe 1 outside the partition plate 15. A damping pipe 2 is fixedly connected between the first air flow port 13 and the second air flow port 14. The damping pipe 2 is spirally wound around the outside of the KF-type vacuum connection pipe 1. Conical grooves are opened at both the upper and lower ends of the partition plate 15, so that the high-pressure gas in the upper chamber enters the inside of the damping pipe 2 from the first air flow port 13, and then flows into the lower chamber from the second air flow port 14, and the gas occurs in the upper chamber, the damping pipe 2 and the lower chamber to achieve gas buffering.

[0020] In Figure 1 and Figure 2 , a first KF-type joint 11 is provided at the upper end of the KF-type vacuum connection pipe 1, and a second KF-type joint 12 is provided at the lower end of the KF-type vacuum connection pipe 1.

[0021] In Figure 3 and Figure 4In it, the first KF type joint 11 is connected to the KF type vacuum interface 4, and a first KF type clamp 5 is jointly installed outside the first KF type joint 11 and the KF type vacuum interface 4. A first KF type sealing O-ring 6 is arranged on the inner side of the first KF type clamp 5 outside the junction of the first KF type joint 11 and the KF type vacuum interface 4. The first KF type joint 11 and the KF type vacuum interface 4 are connected together by the first KF type clamp 5, and the first KF type sealing O-ring 6 is used to prevent air leakage at the junction of the first KF type joint 11 and the KF type vacuum interface 4; the second KF type joint 12 is connected to the high-precision vacuum sensor 3, and a second KF type clamp 7 is jointly installed outside the second KF type joint 12 and the high-precision vacuum sensor 3. A second KF type sealing O-ring 8 is arranged on the inner side of the second KF type clamp 7 outside the junction of the second KF type joint 12 and the high-precision vacuum sensor 3. The second KF type joint 12 and the high-precision vacuum sensor 3 are connected together by the second KF type clamp 7, and the second KF type sealing O-ring 8 is used to prevent air leakage at the junction of the second KF type joint 12 and the high-precision vacuum sensor 3.

[0022] Preferably, the KF type vacuum connecting pipe 1, the first KF type joint 11 and the second KF type joint 12 are all made of stainless steel, thus ensuring sufficient strength and not rusting in the air environment.

[0023] Preferably, the inner side wall of the damping pipe 2 is evenly adhered with an asphalt damping layer, and the damping pipe 2 is made of metal. Thus, the high-pressure air in the damping pipe 2 squeezes the asphalt damping layer, causing the asphalt damping layer to deform, which can effectively reduce the deformation of the damping pipe 2 and improve the service life of the damping pipe 2.

[0024] The working principle of the present utility model: First, the KF type vacuum interface 4 and the vacuum pump interface 9 are respectively arranged at the upper and lower ends outside the high-vacuum housing 10. The vacuum pump interface 9 is connected to an external vacuum pump. The KF type vacuum connecting pipe 1 is installed on the KF type vacuum interface 4 through the first KF type clamp 5 and the first KF type sealing O-ring 6, and the high-precision vacuum sensor 3 is installed on the KF type vacuum connecting pipe 1 through the second KF type clamp 7 and the second KF type sealing O-ring 8;

[0025] Then, the high-vacuum housing 10 is evacuated by an external vacuum pump to generate high-pressure gas in the high-vacuum housing 10, such as Figure 4As shown in the figure, high-pressure gas enters the first KF-type joint 11 from the KF-type vacuum interface 4, and then enters the upper chamber of the KF-type vacuum connecting pipe 1 from the first KF-type joint 11. The high-pressure gas is blocked by the partition plate 15 inside the upper chamber. A part of the gas flows back towards the first KF-type joint 11 and collides with the gas entering the first KF-type joint 11 to achieve gas buffering; another part of the gas enters the damping pipe 2 from the first air flow port 13 and then flows into the lower chamber from the second air flow port 14. The gas entering the lower chamber flows towards the high-precision vacuum sensor 3 through the second KF-type joint 12. When it reaches the high-precision vacuum sensor 3, it is detected by the high-precision vacuum sensor 3, so that the pressure inside the high-vacuum housing 10 can be accurately detected; after the air reaching the high-precision vacuum sensor 3 is blocked, it flows back into the lower chamber through the second KF-type joint 12 and collides with the gas flowing from the lower chamber into the second KF-type joint 12 to achieve gas buffering again; a part of the gas colliding in the lower chamber continues to flow back into the damping pipe 2 from the second air flow port 14 and collides with the gas flowing into the damping pipe 2 from the first air flow port 13 to achieve gas buffering again, thus effectively protecting the high-precision vacuum sensor 3 and improving the detection accuracy of the high-precision vacuum sensor 3.

[0026] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A vacuum buffer damper for flywheel energy storage, comprising a KF type vacuum pipe (1) installed between a KF type vacuum interface (4) and a high-precision vacuum sensor (3), characterized in that: A partition plate (15) for partitioning the interior of the KF type vacuum pipe (1) into an upper and lower chamber is fixedly connected to the middle position of the interior of the KF type vacuum pipe (1); a first air flow opening (13) communicating with the upper chamber is opened at the upper end of the partition plate (15) on the outer side of the KF type vacuum pipe (1); and a second air flow opening (14) communicating with the lower chamber is opened at the lower end of the partition plate (15) on the outer side of the KF type vacuum pipe (1); a damping tube (2) is fixedly connected between the first air flow opening (13) and the second air flow opening (14); the damping tube (2) is spirally wound around the outer side of the KF type vacuum pipe (1); and conical grooves are opened at the upper and lower ends of the partition plate (15).

2. A vacuum buffer damper for flywheel energy storage according to claim 1, characterized in that: A first KF type joint (11) is arranged at the upper end of the KF type vacuum connecting pipe (1), and a second KF type joint (12) is arranged at the lower end of the KF type vacuum connecting pipe (1).

3. A vacuum buffer damper for flywheel energy storage according to claim 2, characterized in that: The first KF-type joint (11) is connected to the KF-type vacuum interface (4), and a first KF-type clamp (5) is installed on the outside of the first KF-type joint (11) and the KF-type vacuum interface (4); the inner side of the first KF-type clamp (5) is located on the outside of the intersection of the first KF-type joint (11) and the KF-type vacuum interface (4); a first KF-type sealing O-ring (6) is provided; the second KF-type joint (12) is connected to the high-precision vacuum sensor (3), and a second KF-type clamp (7) is installed on the outside of the second KF-type joint (12) and the high-precision vacuum sensor (3); the inner side of the second KF-type clamp (7) is located on the outside of the intersection of the second KF-type joint (12) and the high-precision vacuum sensor (3); and a second KF-type sealing O-ring (8) is provided on the inside of the second KF-type clamp (7) 4. A vacuum buffer damper for flywheel energy storage according to claim 2, characterized in that: The KF type vacuum connecting pipe (1), the first KF type joint (11) and the second KF type joint (12) are all components made of stainless steel.

5. A vacuum buffer damper for flywheel energy storage according to claim 1, characterized in that: An asphalt damping layer is evenly adhered to the inner wall of the damping tube (2), and the damping tube (2) is a component made of metal material.

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